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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a8e2b564ab9f6703249c22ea1789cec5964c30ebe60e9c7506e54b5ad70f0db' 
  AND token = 'll6uSqjIY8H3HloxIZmbki13kpq6bWxgjQr/lyAQhZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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