Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a143c2a66f64e529dee53fe339118c60a87ca93f1c9e2aac40bed3b0386d6d60' 
  AND token = 'IhsAm+Pg4NHVJ8R0YaQL29kxqXhDp9rdpHENDKutLso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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