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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '658903083ea20bb80472908af4a2cb3eda6c370b965e84e1f0b36559400c0708' 
  AND token = 'J1UF6Xbice/equ04NRkfWXZvKuhQji055Ct+TeJp9oM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00799

JSON explain

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