Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a187cf619036935a54b60eba376d56f009a2276c7cde53b51815a6068bf6345' 
  AND token = 'p0pCsSq1qCINzevsJMuL6d/o9O9+3zyyYtHRD6GauO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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