Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '125db4a9237497c31a375f90e7a2c6682f019aa4fa4e1c9a477bbe9de360ad1d' 
  AND token = 'tOcV1mBfqhA6YOjXlyM9p6XeUlvueS2wHhfi79M6Gvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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