Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24b22cfeb7364a93d21e66e7d2f8f89083ca26a2c221398f3053e5df3bf5c455' 
  AND token = 'IFAt4aeF8aJdS5YGZEAe6p/GPbFW+lx1mKkzhitPTio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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