Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7e0daed396c23f8d3223aae2de2e839bd3b196786be78eea9f3e764689ed384' 
  AND token = 'Ch1XClDKqqeEA6Y86lEPMW/cHRso5wyJinJlhT8PZbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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