Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '43a80e233c1c6300cf7920588135096ec0c69c937181871a0011f9650bf584ab' 
  AND token = 'xndYXTlXVeoshec/5ynqw86V+kBVjxI7Fgn+XpiilkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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