SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37bc4e53e0050010f11456770019ea503f139165ed32ff536975f8eadc5b8fa5' 
  AND token = 'JGVVorS/zPGm2zA2U+NO2mvMf6+YV3FXzH4KjDnYhfs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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