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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aea34d9a61a20c6a48f5fd069f9e1e5136348210edfccacef5d30b34c4600507' 
  AND token = 'BLhybsuq2EafwP5VLroJZWCGvPoAyHcKUCBBpTK7aJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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