Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5a5a1d8c2a1e23a1ce782cded26650de2b9c6027b27b82032874936e0d178e7' 
  AND token = 'BU52dd6+XawBq1othSnJ/b9aiVaimiNJqM1wXMCtNt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}