Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '158cde8bcaa2c7b8efe1030d7cad2bc8623c4f1abe5b6ddc376100a875234cfb' 
  AND token = 'BXxBefX//86Y8uCVkcluoubc64axRLwAiE0og1kvdzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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