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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbf3e6091a4da820b99f5fffa1fd92be8d487bbf3ec862c25de897041bceff4e' 
  AND token = 'VkMxnwn7MyIIMUhY0yWuAER3cWTJvT+S6bNYuw/exg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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