Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd9e0c9e82d5218e67356011f082a5f0598da7cb5373ed9b69d75c8cdc7b8733' 
  AND token = 'FywRrS0n5hfjwB4D06E+XmSoySWXPgTyRvDSTZH4EC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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