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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '97bd51dbac6fec8b167dc13027f547750949097ed0c3b4127e65f8089c401141' 
  AND token = 'eoPxI1aIrk+moalB1OY4urbif/7wSQisjEVaP9ZCYKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00804

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}