SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32fb1d50877427d9169e36705d3599cc74185731567cfe1b56ad099fb5e4e0ab' 
  AND token = 'NgbiNvZaUGpn35UFDkYpG3SKiAeJ+h6KJ2w9CsVX68s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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