Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bbc5cbe1dc2533b6c760505aab9242c636473f52f2f2002dd6b062af632c5bd' 
  AND token = 'ypk2YO7MekAzYo1e2VUHF9lSL2IJyZU15ORDxlNkuH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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