Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c48d30175731f4c365e519f9ecee166771121d36888a3081355d4c0231da7fe' 
  AND token = 'iVLUNYPGxN28a3qjU4794J2BdxEw3vSYhCm+cfVdZ/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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