Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a307a2608de66689e192fe823c75116bc4b871d258019d557aaff6a10d3c410' 
  AND token = 'eEcQSXOq4HrJyIyRLTw6nxiVWjD1ptudpEqCiB/iBFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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