Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '59c2621914f32b00c9588794320e4bce5647d4f069d5a5ce7e1c2a494ec7cf78' 
  AND token = 'ifOJIUCmDsgBsOmFpA6gp4mq6dbddu6FdCnN+5ldJ7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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