Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c89d47340fc59f87b0dd1a998dc31117bbc6a70a8ced8572a9ebda382fdae9e7' 
  AND token = 'wqO2pD4qXouL9Qu2Nd3dBqC0kj4oC5OKkbf04rjx21o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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