Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67c516af949011c896a892123e6100ec31bc6f6ae1dfce4ea4817c52fdb6206d' 
  AND token = 'fvJSVShEldAepjmJlr0nZBEuUwqRbb3kcTznB1dePXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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