Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b88dfe9af74ad02dc69efec19c9fe484250429862ba956c10b25624c6086fd3a' 
  AND token = 'sqPLPBjqf4r9sxduBP5vEi7qP4kQTiQ9vudLGI8kaO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}