Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b287e2a76208270bb4c24cf0cbb244e065adcd9996ac467849521be38d24a255' 
  AND token = 'F9po11a7A5vVK38R++bj6ecIJcyCpOvjYwd8dT/HfCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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