Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8527258a0144aa3f6b59d161aeca611ee2ef42960823504d06244570f7a65c0d' 
  AND token = 'ZaS3R1dqfQKWyUYsb65iH1u/DT3p8YOLEW02QYj6ZhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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