Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1ce2b7321adf128db272b786cb4780a71fc042aea0c423ba49240f229ed010e' 
  AND token = 'eu4QCGzndgcc4dgAGN04ly52pvGbSsHvrqYptmqu5YQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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