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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7012917e41ee502855888c59c6fb48f523a25fab5bed860a98fe343a3f7e92cc' 
  AND token = 'lrxHANUZUtw+UsUZtp1iA4ZShZpeIw2esn/4gY0J+eg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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