Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df5e328199096058f2786e1c4bdd1148e6dfa183ce442703c01843807488fc0c' 
  AND token = 'qfGcUuamnnNWscvLEjOrJQbmqe0Hp0pFbjNqMcBP8+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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