Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fb37ad54a7f4fd1d6b6ecc1bd16c387f3a12e6de7ef525767749d88eaecc7c3' 
  AND token = '18l4fkFzBKUar+Z+PUhflN26qDHVk1DZO+1i7DccLC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}