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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '101058b9ff39ee0a0de21fcf10f882483526686a7afa6b71490b694d5f65c8e9' 
  AND token = 'IjGI4wT0OkWUMDdX9GgRlwLw+MzkscgmqeinXzDbPYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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