Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea88d9f2bd2039b8ea4fc83a3a2c1f86e5fc86f0c216318f0d792caeb80545a3' 
  AND token = 'KADdRVncvUbhgevWTkFnNux9CeMMyWbYu+UakqjkApg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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