Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f3df0bd3db3476ec0251e03beb16750479560023d5b2dfa60ea47f5a09c184dd' 
  AND token = 'cRgoRoQQSBwb9EmCPbj2AL1baNbz0xIOA74PqaK8RtQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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