Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '375066c40dc4af20695d61d6888032081a3868c58e54b974885ae9106542208f' 
  AND token = '2DQmx8UI7MEMdX99Em+Yp1jYecL5MfTNnsDvkC/BDGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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