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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '169d3fdc8b9ca69b09fc7c35563083536efa8cd4eeeeb6aa0a79f35df42e94db' 
  AND token = 'GhJhXwOsQsI7+LcyzYJ47wEUdOqdKj99a0FUyKmVfV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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