SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2722e3fa9467e460ad54594e2a7e34697718f89399845393ac00eb1e00d564e5' 
  AND token = 'Uy/oUnMrBbt3a/+iyuyVz69WTXBztlP1lxrtuBHvvTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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