Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33d3010c294f2e3353e30e26c62be21ddd58db550218538a1195f2d31b73b962' 
  AND token = '9RvHHyfFTkM+7+FWGWusbrVmSAjhEeJlVnPgB81NqCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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