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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01d0a9c63f917b18e0a4e95fce05f0847cc187e840ac99918b2b4dc1f523ab11' 
  AND token = 'fjf8G1mb43YkQQHf9Mu+hxGU5y5XaGeXPHv7a4yIEws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00099

JSON explain

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