Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '892c7d70fbf23fcdc139abd8b6bd921944954106a91e4f2c3fd84f4e0ed7496f' 
  AND token = 'ZtetbRbR09hDNLQP2dLqAEyaW5vER1mDCJuchA7h2fk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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