Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31540cfbbe5e1a80647811280e4c54a3e754412e04bb4a800c1fd49fdba39a3c' 
  AND token = 'O5g9muM0/vHw4oYxyMlnlqnnLpEHO0+dBEdOBMzNnuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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