Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6c5ea9b641895bb5db331862c2a222f44b3df69b29125a667b35b49ecf13eb6' 
  AND token = '80rvlk1kDDBaDpU8jxAajc/B9th5OvFKyf4ndcRFDKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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