Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef4930e34ead1c05478233419c1c1710f33d080778eaab93f19044ec9e381bb6' 
  AND token = 'VkXwEn8HCy4/Hcll6wGf28A7D/8bAW/f85zpPhFx/WE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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