Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5319112bc505b3fbd6ccc5baacd0c0191f0c716256bceb6af12f228686060cb8' 
  AND token = 'POMlTGd2ZUhH197HOIhkJqlftN6pG63zvvto2AlJNZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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