Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16169f02dd39ea40cf850c316ebfff3a855d19b8cf1b5b24c886ae8b7d376d6e' 
  AND token = 'dpUWfmGcgAWe0FKcku5FD4xHVBDbtqlDjKsX7mu0hFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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