SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aec1129178719ef3f2e6a33f798feb95f685694dbfb0e03c51bba7b988ce2920' 
  AND token = 'd2SxEVOHTlh+VHVtNG0kz/v5s/t1m69tzDFR+P+XJEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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