Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f02c20aac71067001398e04e626d79da5c3b71ce98e6c84fa6528f661e588eaa' 
  AND token = 'sm8Jh0whVPsXZ4d4wLl+M6Lq7icASPFQgcpjUbVsC8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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