SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a195df5307cc0b72875af5130755203fb7339dfb4d661d9ccad895bf076145ca' 
  AND token = 'p6iCLy+Bjkg4B9dMk4dwv2Jba2K6SwVfq6Vr8zyGg4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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