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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'affb23d9a1c94f9b5cb15db2b9b2201888143ac59d16c60a8cd317ce0ba4e0f5' 
  AND token = 'IAGSpePjipdGkpTFofdZPdmMGboYouVHcbAbUq/5lzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01695

JSON explain

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