Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a76dbb56d065be221873b109a3bac60f986fd2caa9a099e51e73bbc2f6bfa3b' 
  AND token = 'ifWqBx1DYyMSRubPZh4ZVfS0rf1vfqWXSbKoreKhg+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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