Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73bc2c0b98c9dc75b159503e697639173057880142485a4c4de3b7ee08c0a27e' 
  AND token = 'AoVjVnbiV9NJtHNHVEKecP0+wjGvRipEUPJakXxPcV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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