Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9ba0f571c764970ecae320ee9472898bb9de64fa107ce25817f33bb7cd6647a' 
  AND token = 'LMJw5lWizR44UVfYkLSkYRonQYMkvsEV/UCGxE1LvAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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