Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21e72cf5ee570c4ce3f9b2480011b360a0212692d9f8db21df111b631fef3812' 
  AND token = 'BxKRBSA5uo+I1ZT7UjyVx5u4oF7OBXDyJXTYRSH1M4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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