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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'b95dbff3f885727e08ade3a1af807eac9c265064ddf6c674fa0ec4fabeea6cf6' 
  AND token = '6bV0zlFVels3h899H8dl4OVr1sVrsImUgQIlgui7uFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00945

JSON explain

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