Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4753ba09024548eb6bf790ae2fe2af0805f6defe174e3122f9b9fa0415525f2c' 
  AND token = '6HQxyxTHEH3hkj8JlCcO5AcL7E5g1S+5qNxt+W/B2z8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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