Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '195fc24905aa21387c7d61661c9bbf9ac287782feaceca9fd213553bc133a6e1' 
  AND token = 'UL55ZtgTlkGyHnXiIYFFV2XRc+ATfAbX3NWBMKkCfVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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