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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a919f72d1ccc8d2b41ad52cd547cbb11774a2002e8abb23236546f643eb1d529' 
  AND token = 'EaXPQB+7FnT4F022w8dF3Vwl42UxPa8NAsfap5jdtE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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