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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07a9284fc51f7d8fdbc4e7d96c4d5db63927f848fe7eb08ad3428b7f1f2ea495' 
  AND token = 'Tjkq4KoKJcqy1c+r7ypWp25kKWaNdjvxekWq3TITpN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00096

JSON explain

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