Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fded4f0febf7678eb5ea0329938ad3c1140dd3e36107fbf7916bf2c8cce00694' 
  AND token = 'f6GieTJdHdzpymcZR/6lkOIwY49iLyadd5cOrxAdHCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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