Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5bbb55569f3e5af8813d3ddccdc7c20b640dce67450fd63b16b7a539ddefaea' 
  AND token = 'jrfG40S0OtEhjizUcpZhg1lcMgkS3GObcYczJvmsaH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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