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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef43b6c6e4a65225c0f00c6a8acf969f8a07b212ef9b83b36cb3dac5160eef5d' 
  AND token = 'TPsETFGnnHIh0H+zRUtLmgW5NWri4Yuh4FWl6mGK+e4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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