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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2573680301b7c9dbd2f67def81feaba444a9c57d63a921a8cef217d11348ffb' 
  AND token = '8+LEi00XJNanZ37acX94V+m7MOdj3opYCu6FDjJVN8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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