Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '955a879036c8d4dbfd4d93b73bab8dfd135c34151976d5280fdd2a44f975d449' 
  AND token = '8JNtygyToCYiI1iqFMV8+aNJWZV4Z/tYzNsYRuerDIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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