Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebbb5ffe82ce8b4bb1121fc4eb931adeb6c8e18177c8d21ff47401c74a7ba5a7' 
  AND token = 'BAcM6tOz/uMtd+2xPRwsg1esVCShMBOHOG4hQdJyWC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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