Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a63a3caea2b20a27d89017607bcd55064e10379ea745e575b054caa26e592aff' 
  AND token = 'MhBAo9WKaHglEofuvDxaPPXQ/2438l6ZCIpnGDj+h9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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