Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5505b54a918004407c7aeaab06d7dad5ea40526a268767cfa5ca33dd5715d2d8' 
  AND token = 'ncZRxcJ+61oGW8ui2xTxIhXGgbxuoeBUJ7Gs4Cenhmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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