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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dd11f4b41f2ca5c8ada57868621d20af9714a32e06314b22827d59a1a35f1c2' 
  AND token = '8ikUqYD1YZ7JPRWYOw0WCFbY+cPl91jliG3xvoZuJt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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