Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60606fd4ec799e6c6e06b88048afca2360f0a4d753238ddeaa87a7718d9888d3' 
  AND token = '2cXYGseK3JGddQqDH3uuxBZ4GVI5tY1axAF86peQCCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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