Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7259de75475b5cbce2d728ad5ecd7e46a0223d1d71dd6a2cda5b898688849539' 
  AND token = 'ctp2yf0Z8dlAG8VvWNHLu8lxk3UsfILAHmzKBz72t2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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