Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c355aea30a15766eebec235f859b1352473ffeba8c4a7fbff1ef39f9259b729d' 
  AND token = 'ik/fNMjt8eLhtOUXRRKEIIo0Q4aj+r81h+PC5QokyDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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