Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'caf059bf2da349520df449923b8446483228f67c8340efd0ac463db6a44173dd' 
  AND token = 'BFfOGNfkqBFC3P7aT2o+kz3g9pfVr93D1Ezh7uFXpnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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