Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d0f9add49f3b3c40e38650501184c54aa213b4c1ecbacd3fed00cf78ac03b3e' 
  AND token = 'FcX94dh/XXdMx1QdJbauN+v/VSC90b9UDCZTDqwroHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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