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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9107a3e0e8f324cee514dda7da6f4e0e0683ad14adc23d52a5eb4bde8780ee26' 
  AND token = 'qgSegqQNCl5kyX7gMAPm+KpQ3oo8jb0jFlId7vyWVTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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