Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e34f77afd387c20f923b94b5ef7c15106c062313fb3cdb3ed8e0f40db6becc3f' 
  AND token = '9mKyzfJ8Vs83wcVm7P1kclr4F9Tz9LIb4IVQLlmRGMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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