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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aa181cdaced77fbbad44bb45d2540e8d7c31ea586f8d16c2c12d5eaee7e862f' 
  AND token = 'ogjvJdmW+vp7cR4OdOX6mAjskmvx4CMk5w2u6aXKwXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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