Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f2ebd3d67c9fb00f192b8868e8be2a7de4179523d6877d0d355f1521b55c530' 
  AND token = 'ttYF270CmyL+24JVFk64yer9BJXC4A0HuOLBQuNVBCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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