Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90cb6491a200b1bd0fbdf6b9b027bc8a5f6e294a592b16aca3c5959cb282bfcf' 
  AND token = 'IXShbKW3O9w1ka27XVXNbOo825T7h/h+xjNARm4/QLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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