Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af23ea86a848e2ed959b6bab8dec13b01caac7ed10d5db4b8a88d607928c7529' 
  AND token = 'oaxyHyw6Dkf3QU3qS4gX7DXrc5/rA1dIJraNQYuRXjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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