Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fc5f668ec2ad517b2629513bfe4f6d645cf01b3ac119a4f0d087c92636428c6' 
  AND token = 'Y0ZLP/c3QGQhncW5aRr/PCf3c3XV8memRabXOAr5KMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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