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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e97ad5bc0d07f591c35e2ba77062b789c601bb6c466cd1c9ba88087cc7c5db0d' 
  AND token = '/1jzSRU3N7WD02DoZ/5v2F85j7gtFiRW2aB24sbar7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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