Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0c07d90b7f4bc4548d139b474f14ec51e8c5761e7aab7388faddb9d944e6849' 
  AND token = 'zY/fsTKRtB3caCdlBLY6V6mg10gpWVHT5DhymNH7PGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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