Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96869cb809c8a6d12902b15ed1fc191785bb7722ab2d4a761a5844cef1ac49ab' 
  AND token = '3L+5h9S2+FMUbvc9VPp5sYXua0nSVYP4XjBvbr/KrwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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