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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dda5f124cc26c74852a9137ed576cb3e549e581ee0949a74af41d744e0a7fafa' 
  AND token = 'KFTel80YoHlycYyG5/mepRU+3fYI+qyoQykdVHZYnZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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