Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1607875db8620d0d38cf945ca45cc7652caa3435c877f5a9e0d17668fb94031d' 
  AND token = 'uThoyNZrYip+wOkyH+9Maq8yJK90566POPqSy4c2nGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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