SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7f06297a3ad0f6a87d2e5ca0626b8757f334894b93aa8098bab28abf8b72461' 
  AND token = 'GJfzj5Kciit2+d/mMB/oNc1GStb1YhpWloX/Tv52A4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}