Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'abd37b589bbcc75e46f3a48d424058834b921237370b576555fcbbb09c897872' 
  AND token = '5vIdldCpBwf2PQpO5yDaMg+z94MPg4O60HqxWgXQ1sk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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