Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aedfb599db40ad9a4d75d17fc5c50c105e31ac945c187f7120ba5da33e49d98' 
  AND token = '9JTxs+vZO4+DQVqqiu52rEwZjeK6hbNLVMKMLfDjyxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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