Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd364501d93a4cbd080f9ecac1489e509fd1e4234aebf5decb11ef9b518b2734c' 
  AND token = 'O3fzLPUjuE0BGbg2i9PZHKoqJT5EDUxknnf4IHMt/oA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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