Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b1e90b24064438e65c145de26d5946882bbf7685879a9d34e4d6c27446efd88' 
  AND token = '0j3bT4+4Wp6v2/dfG2Y79LSkX4LfK7QHjv1b/TYI/34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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