Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4078a49ce3e64ded844477104329b8b3fe4bd6149d800e9369afa9a0fb35d8e5' 
  AND token = '3vlMLITHR23K0spqdYZ3q+W2UPZmKCnvkf2XQWyHvFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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