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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9bfa4a62ea7adb05ba251862bb199c60efa726e8234d85eaf98541d03429d7d' 
  AND token = 'umDhma8OJRQ7s0NAR+l1sv9Pb4d+bVy5ep1YYrOnHes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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