Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '217dbe59001d9a17955c6aca995610751ed6eb641abfb1e97dfde3125a358285' 
  AND token = '2lBmvvBhssvrnCLAVD+5jZX+Ck2bW8lwhIrrsAgpaOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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