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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80d9a2dd2d28caec045dbb09faeff3fbd6fdfaaea4cfb4e6ca3e2600fa1db7b1' 
  AND token = 'G6xbprpfwUTSXqmmgtCBfYlZgfUvy71S8FzlLVcTdVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00116

JSON explain

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